A flocculant trial order should be large enough to complete the planned comparison without creating unnecessary stock of an unqualified grade. Start with the test plan and the commercial-product basis, not a supplier's standard bag count. Separate laboratory screening material from the quantity required for controlled operation of the actual clarifier.
Define the trial hours and operating flow
List the planned trial stages, the expected treated flow and the hours spent at each condition. Include enough time to observe the relevant process response rather than stopping when the first clear sample appears. If the clarifier is restarting after maintenance, use the start-up trial guide to distinguish commissioning checks from a product comparison.
Record which candidate doses have already been screened and which remain unknown. Do not calculate a precise production quantity from an untested universal dose. A preliminary estimate can use explicit assumptions, but it should be revised when screening provides a defensible range.
Calculate commercial product mass consistently
For a dose expressed as milligrams of commercial product per litre, product mass in kilograms equals treated volume in cubic metres multiplied by dose in milligrams per litre, divided by 1,000. For illustration only, 2,000 cubic metres at 1 milligram per litre represents 2 kilograms of commercial product. These numbers demonstrate unit conversion, not a recommended treatment dose.
If the supplier reports active polymer instead, identify the conversion to the actual supplied form before ordering. Do not confuse the volume of prepared solution with the mass of product consumed. Ask Xinqi Polymer to confirm the candidate's preparation basis and discuss available trial quantities through the polyacrylamide supply range.
Allow for the actual preparation arrangement
Account for minimum preparation batch size, transfer lines and unavoidable retained solution using the plant's own equipment information. Identify whether a new batch is needed for each trial stage. Do not add an arbitrary percentage and call it a proven allowance; record the reason for any contingency so unused stock can be understood afterwards.
Check the packaging offered for the trial and whether partial containers can be handled under the product's storage instructions. A nominally economical package may be unsuitable for a small intermittent trial if most of the material cannot be used or retained appropriately.
Release and reconcile the trial order
Tie the order to a sample reference and a named commercial grade. Keep the tested product separate from routine stock. After the trial, reconcile delivered mass, prepared batches, consumed material and remaining stock. That record improves the next estimate and prevents a one-off commissioning loss from being mistaken for the product's normal operating consumption.